This website uses cookies to ensure you have the best experience. Learn more

Ip Spoofing Essay

3206 words - 13 pages

12/7/2014

IP Spoofing ­ Cisco Systems

The Internet Protocol Journal, Volume 10, No. 4

IP Spoofing
HOME ABOUT CISCO PUBLICATIONS AND MERCHANDISE THE INTERNET PROTOCOL JOURNAL ISSUES VOLUME 10, NUMBER 4, DECEMBER 2007 Book Review Call for Papers Download PDF Fragments From the Editor IP Spoofing Looking Toward the Future Remembering Itojun Security Standards
Layers above IP use the source address in an incoming packet to identify the sender. To communicate with the sender, the receiving station sends a reply by using the source address in the datagram. Because IP makes no effort to validate whether the source address in the packet ...view middle of the document...

Spoofing an IP Datagram IP packets are used in applications that use the Internet as their communications medium. Usually they are generated automatically for the user, behind the scenes; the user just sees the information exchange in the application. These IP packets have the proper source and destination addresses for reliable exchange of data between two applications. The IP stack in the operating system takes care of the header for the IP datagram. However, you can override this function by inserting a custom header and informing the operating system that the packet does not need any headers. You can use raw sockets in UNIX­like systems to send spoofed IP datagrams, and you can use packet drivers such as WinPcap on Windows . Some socket programming knowledge is enough to write a program for generating crafted IP packets. You can insert any kind of header, so, for example, you can also create Transmission Control Protocol (TCP) headers. If you do not want to program or have no knowledge of programming, you can use tools such as hping, sendip, and others that are available for free on the Internet, with very detailed documentation to craft any kind of packet. Most of the time, you can send a spoofed address IP packet with just a one­line command. Why Spoof the IP Source Address? What is the advantage of sending a spoofed packet? It is that the sender has some kind of malicious intention and does not want to be identified. You can use the source address in the header of an IP datagram to trace the sender's location. Most systems keep logs of Internet activity, so if attackers want to hide their identity, they need to change the source address. The host receiving the spoofed packet responds to the spoofed address, so the attacker receives no reply back from the victim host. But if the spoofed address belongs to a host on the same subnet as the attacker, then the attacker can "sniff" the reply. You can use IP spoofing for several purposes; for some scenarios an attacker might want to inspect the response from the target victim (called "nonblind spoofing"), whereas in other cases the attacker might not care (blind spoofing). Following is a discussion about reasons to spoof an IP packet. Scanning An attacker generally wants to connect to a host to gather information about open ports, operating systems, or applications on the host. The replies from the victim host can help the attacker in gathering information about the system. These replies might indicate open ports, the operating system, or several applications running on open ports. For example, a response for connection at port 80 indicates the host might be running a Web server. The hacker can then try to telnet to this port to see the banner and determine the Web server version and type, and then try to exploit any vulnerability associated with that Web server. In the scanning case, attackers want to examine the replies coming back...

Other Papers Like Ip Spoofing

It530 Assignment Unit 1

1422 words - 6 pages , which is based on 32-bit decimal addresses. IPv6 is based on 128-bit hexadecimal addresses, therefore, it allows multiple level of sub-netting and address allocation. Another main advantage of IPv6 is it enhance computing security features. By building IPSec into IPv6 protocol, it has the capabilities for validating addresses and forming trust between routers. Making it harder for criminals to create IP address spoofing attacks (Franklin, 2010

Fxt2-Task2 Essay

1301 words - 6 pages hacked into the human resources, payroll and electronic mail systems. The employee was then able to manipulate payroll data, intercept emails and impersonate staff through electronic means. There were a number of techniques used in this attack such as network eavesdropping, IP spoofing, social engineering, man in the middle, and escalation of access privileges. All of these types of attacks are consistent with an experienced hacker who knew

Enterprise Continuity Planning

3229 words - 13 pages pay by increase his base salary rate. The employee had success in performing this crime by spoofing an IP address, allowing their self the ability to eavesdrop on the network. By spoofing the specific IP address, the employee was able to find the location of the data and successfully modified it for their gain. After the fact, the employee received two paychecks containing the fraudulent salary. An auditor, who was effectively performing their

Fxt2 Task2

2188 words - 9 pages A1.Nature of the Incident An employee hacked into the human resource records system at the employee’s place of business and changed the employee’s base salary rate to obtain a pay raise. The employee did this by spoofing an IP address in order to eavesdrop on the network. Once the employee identified where the data was stored and how to modify it, the employee made the changes and received two paychecks with the new amount. IP Spoofing

Cyber Crime

1366 words - 6 pages , and credit card details (and sometimes, indirectly, money) by masquerading as a trustworthy entity in an electronic communication. TYPES IP SPOOFING s the creation of Internet Protocol (IP) packets with a source IP address, with the purpose of concealing the identity of the sender or impersonating another computing system. TYPES CYBER STALKING is the use of the internet or other electronic means to stalk someone. Stalking generally

Introduction to Cyber Crime

1950 words - 8 pages : (DoS Attack): : This is an act by the criminal, who floods the bandwidth of the victims network or fills his e-mail box with spam mail depriving him of the services he is entitled to access or provide . Many DoS attacks, such as the Ping of Death and Teardrop attacks, exploit limitations in the TCp/IP protocols. This act is committed by a technique called spoofing and buffer overflow. The criminal spoofs the IP address and flood the network of

Ch1 Comp Security

2308 words - 10 pages : 12 11. Which threat is the most common intellectual property (IP) breach? a.|Software piracy|c.|Shoulder surfing| b.|Spoofing|d.|Password cracking| ANS: A PTS: 1 REF: 12 12. Which attack is used when a copy of the hash of the user’s password has been obtained? a.|Rainbow attack|c.|Dictionary attack| b.|Brute force attack|d.|Spoofing| ANS: A PTS: 1 REF: 13 13. Which e-mail attack occurs when an attacker routes large

Development

2138 words - 9 pages it works G. PIM sparse and dense modes Windows admin interview questions A. Describe how the DHCP lease is obtained. It’s a four-step process consisting of (a) IP request, (b) IP offer, © IP selection and (d) acknowledgement. B. I can’t seem to access the Internet, don’t have any access to the corporate network and on ipconfig my address is 169.254.*.*. What happened? The 169.254.*.* netmask is assigned to Windows machines running 98

Packet Sniffing

3387 words - 14 pages , msgsnarf, urlsnarf, and webspy passively monitor a network for interesting data (passwords, e-mail, files, etc.). arpspoof, dnsspoof, and macof facilitate the interception of network traffic normally unavailable to an attacker (e.g, due to layer-2 switching). sshmitm and webmitm implement active monkey-in-the-middle attacks against redirected SSH and HTTPS sessions by exploiting weak bindings in ad-hoc PKI. * IP spoofing : When the sniffing

Wireless Network

2018 words - 9 pages ). There are three different threats that affect wireless network in different organizations. They include Eavesdropping, spoofing and denial of service. Eavesdropping is the attack that affects the confidentiality of the data being transmitted over the network by a third party. This affects signal control in wireless installation. Spoofing is where the attacker gains access to resources and privileged data within an organization network

Firewalls: Guidelines and Procedures

3091 words - 13 pages problems within the TCP/IP specification and protocol stack. For example, many packet filters are unable to detect when a packet’s network layer addressing information has been spoofed or otherwise altered, or uses options that are permitted by standards but generally used for malicious purposes, such as IP source routing. Spoofing attacks, such as using incorrect addresses in the packet headers, are generally employed by intruders to bypass the

Related Essays

Ip Addressing Essay

614 words - 3 pages reasons, including the (legitimate) use of non-globally unique addresses for router interfaces, source address spoofing in DDoS attacks and the use of unallocated address blocks for malicious or fraudulent purposes (Hyan, 2004) Martians A Martian packet is a packet that is reserved for special use by (IANA) and can’t actually be used or delivered. They arise in denial of service attacks from ip spoofing (Baker, 1995).

Term Paper

849 words - 4 pages header parameters of TCP and then wrap | | |packet with TCP |your IP address in the other class created for IP packet. | |5,59,38 |Implement IP spoofing in TCP packet |Demonstrate it by changing sender IP. | |6,65,39 |Implement IP spoofing in UDP packet |Demonstrate it

Lab1 Essay

786 words - 4 pages : echo request check for connectivity. ACK/SYN ping: port scanner that generates raw IP packets and receives an ACK 9. How many total IP hosts (not counting Cisco device interfaces) did Zenmap GUI (Nmap) find on the network? 5 10. Based on your Nmap scan results and initial reconnaissance and probing, what next steps would you perform on the VSCL target machines? Mac address spoofing to gain access to the network. Prepare an attack

Building An Access Control System Essay

996 words - 4 pages and countermeasures that a company can use to deter and avoid vulnerabilities are as follows. “Spoofing user identity -use strong authentication for passwords, do not store secrets (for example, passwords) in plaintext. Do not pass credentials in plaintext over the Internet. Tampering with data –use data hashing and signing, use digital signatures, use strong authorization, use tamper-resistant protocols across communication links, secure